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題 名 | 樓房結構之動態行為識別與預測=Identification and Predication of Dynamic Behavior of High-rise Building |
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作 者 | 王安培; 柯年芳; | 書刊名 | 中原學報 |
卷 期 | 25:3 1997.08[民86.08] |
頁 次 | 頁21-29 |
分類號 | 441.56 |
關鍵詞 | 系統識別; ARX模式; 模式降階; System identification; ARX model; Model reduction; |
語 文 | 中文(Chinese) |
中文摘要 | 本文針對樓房結構作系統識別以探討結構系統之轉換函數,並預測受地震力時的 結構行為。 由結構物量測的加速度、速度及位移等資料,經由 ARX 模式識別系統之參數, 求得系統之頻率、阻尼比、轉換函數與歷時反應,進而預測此系統受外力之結構行為。首先 模擬三個自由度之樓房結構的動態反應,由所得資料進行識別,同時亦考慮量測誤差,再依 識別出的系統模式作預測, 其結果驗證本文採用 ARX 模式和簡化階數法求得之模式可有效 的表示該層房屋結構的動態行為。接著將此識別和預測方法應用於志清大樓。識別所得結果 比林和何所採方法之結果相當接近。本文採用的分析方法比以往先由頻率域分析更能準確求 得自然頻率、阻尼比、轉換函數與歷時反應。在系統之降階方面引用主能量模降階法,其可 有效的使系統簡化而不會造成系統失真和不穩定的問題。 |
英文摘要 | The aim of this research is to study the identification of high-rise building and to verify the transfer function of the system in order to predict the hynamic behavior of the structure under earthquake. This research uses ARX model to find the frequencies, damping ratios, transfer functions and time response, so as to predict the dynamic behavior of the system. First, a structure with tree degree of freedom was modeled with the consideration of errors in measurements, and the response was simulated. The result shows that the ARX model is acceptable for prediction of the dynamic behavior of the structure. Finally the identification and the prediction method are applied to the Chih-Ching Building. A satisfied result is obtained when compares with Lin and Ho's method. The proposed method is more accurate in obtaining natural frequency and damping ratio than the frequency analysis method in the past. in the aspect of model reduction of the system, this research uses the power decomposition method which can simplify the model without causing any unstable problem. |
本系統中英文摘要資訊取自各篇刊載內容。